Bicycle frame



FIG. 1 is a perspective view of a bicycle frame showing my new design;

FIG. 2 is a left side elevational view of the bicycle frame of FIG. 1;

FIG. 3 is a right side elevational view of the bicycle frame of FIG. 1;

FIG. 4 is a front elevational view of the bicycle frame of FIG. 1;

FIG. 5 is a rear elevational view of the bicycle frame of FIG. 1;

FIG. 6 is a top plan view of the bicycle frame of FIG. 1; and,

FIG. 7 is a bottom plan view of the bicycle frame of FIG. 1.

The broken lines shown in the drawings illustrate portions of the bicycle frame that form no part of the claimed design. 

CLAIM The ornamental design for a bicycle frame, as shown and described. 